<template>
  <div class="app">
    <!--查询表单-->
    <el-card class="operate-container" shadow="never">
      <el-form :inline="true" class="demo-form-inline">
        <el-form-item label="名称">
          <el-input v-model="searchObj.name" placeholder="讲师名"/>
        </el-form-item>

        <el-form-item label="头衔">
          <el-select v-model="searchObj.level" clearable placeholder="头衔">
            <el-option value="1" label="高级讲师"/>
            <el-option value="0" label="首席讲师"/>
          </el-select>
        </el-form-item>

        <el-form-item label="入驻时间">
          <el-date-picker
            v-model="searchObj.joinDateBegin"
            placeholder="开始时间"
            value-format="yyyy-MM-dd"/>
        </el-form-item>
        <el-form-item label="-">
          <el-date-picker
            v-model="searchObj.joinDateEnd"
            placeholder="结束时间"
            value-format="yyyy-MM-dd"/>
        </el-form-item>

        <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
        <el-button type="default" @click="resetData()">清空</el-button>
      </el-form>
    </el-card>
    <!-- 工具按钮 -->
    <el-card class="operate-container" shadow="never">
      <i class="el-icon-tickets" style="margin-top: 5px"></i>
      <span style="margin-top: 5px">数据列表</span>
      <el-button class="btn-add" @click="add()" style="margin-left: 10px;">添加</el-button>
      <el-button class="btn-add" @click="batchRemove()" >批量删除</el-button>
    </el-card>
    <!-- 表格 -->
    <el-table
      :data="list"
      border
      stripe
      @selection-change="handleSelectionChange">
      <el-table-column type="selection"/>
      <el-table-column
        label="#"
        width="50">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="name" label="名称" width="80"/>
      <el-table-column label="头衔" width="90">
        <template slot-scope="scope">
          <el-tag v-if="scope.row.level === 1" type="success" size="mini">高级讲师</el-tag>
          <el-tag v-if="scope.row.level === 0" size="mini">首席讲师</el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="intro" label="简介"/>
      <el-table-column prop="sort" label="排序" width="60"/>
      <el-table-column prop="joinDate" label="入驻时间" width="160"/>
      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <el-button type="text" size="mini" @click="removeById(scope.row.id)">删除</el-button>
          <router-link :to="'/vod/teacher/edit/'+scope.row.id">
            <el-button type="text" size="mini">修改</el-button>
          </router-link>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页组件 -->
    <el-pagination
      :current-page="page"
      :total="total"
      :page-size="limit"
      :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
      style="padding: 30px 0; text-align: center;"
      layout="total, sizes, prev, pager, next, jumper"
      @size-change="changePageSize"
      @current-change="changeCurrentPage"
    />
  </div>
</template>

<script>
  //引入定义的接口js文件
  import { findQueryPage, removeById,batchRemove } from '@/api/vod/teacher'

  export default {
    // 定义数据模型
    data() {
      return {
        list: [], // 讲师列表
        total: 0, // 总记录数
        page: 1, // 页码
        limit: 5, // 每页记录数
        searchObj: {}, // 查询条件
        multipleSelection: []// 批量删除选中的记录列表
      }
    },
    created() {
      this.fetchData()

    },
    methods: {
      // 批量删除
      batchRemove() {
        if (this.multipleSelection.length === 0) {
          this.$message.warning('请选择要删除的记录！')
          return
        }
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          // 点击确定，远程调用ajax
          // 遍历selection，将id取出放入id列表
          var idList = []
          this.multipleSelection.forEach(item => {
            idList.push(item.id)
          })
          // 调用api
          return batchRemove(idList)
        }).then((response) => {
          this.fetchData()
          this.$message.success(response.message)
        }).catch(error => {
          if (error === 'cancel') {
            this.$message.info('取消删除')
          }
        })
      },
      // 当多选选项发生变化的时候调用
      handleSelectionChange(selection) {
        console.log(selection)
        this.multipleSelection = selection
      },
      //跳转到添加页面
      add(){
        this.$router.push({ path: '/vod/teacher/creat' })
      },
      removeById(id) {
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          return removeById(id)
        }).then((response) => {
          this.fetchData()
          this.$message.success(response.message)
        })
      },
      fetchData() {
        // 调用api
        findQueryPage(this.page, this.limit, this.searchObj).then(response => {
          console.log(response)
          // debugger
          this.list = response.data.records
          this.total = response.data.total
        })
      },
      // 每页记录数改变，size：回调参数，表示当前选中的“每页条数”
      changePageSize(size) {
        this.limit = size
        this.fetchData()
      },
      // 改变页码，page：回调参数，表示当前选中的“页码”
      changeCurrentPage(page) {
        this.page = page
        this.fetchData()
      },
      // 重置表单
      resetData() {
        this.searchObj = {}
        this.fetchData()
      }
    }
  }
</script>

